Water-color printing ink and process of making same



Patented Feb. 21, 1928.

UNITED STATES PATENT [OFFICE JOHN HOEFFLER,

- WATER-COLOR rnm'rme INK AND rnoons's or ll'olJrawing.

' My invention relates to a water color process ink for printing three and process and halftone plates,

process of producing an ink of this kind.

The ob'ect'ofmy invention is to produce an ink, or the purposes stated, superior both in relation to permanency and color efiect to any ink known to me.

In. carr ing my process into practice, I

and to the I use ingre ients well known in the ink makers art, but I adopt an entirely novel rocedure by which the superior results re erred to are obtained. I

' The following is a specific example of, my newlprocessz Two parts by weight of gum arabic mixed with two parts by, weight of water are added to eighteen parts by wei ht of glycerine, and the entire mixture is t en heated until it attains the specific gravity v 1 of 1280 degrees Baum. Heating to the exusing the ingredients in the proportions specified. i

I am aware that gum arabic and glycerine have heretofore been employed in preparing four color 01' NEW YORK, 11'. Y., ASSIGNOB TO I. HOEFFLEB a co., me, or NEW YORK, N. 2., A CORPORATION or new YORK.

MAKING SAME.

- Application'flled larch 12, 1927. Serial No. 175,008.

ink bases, but I believe that I am, the first to dehydrate a mixture of these constituents and as a result of this step to produce an .ink which may be highly advantageously used on any printing pressfor three and four color process and half tone plates.

I claim:

1'. Theherein described process of producing abase for a water color printing ink, which consists in forming a solution of two parts by weight of gum arabic and two parts by weight of water, mixing the solution with eighteen 1parts by weight of glycerine, and heating t e mixture until it attains the specific avity of 1280 de es Baum."

2. he herein describe process of produc-- mg a water' color printin mk,which consists in mixing a solution of gum arabic with a preponderating quantity, of glycerine, dehydrating the mixture by heat to produce a paste, adding pigment to: the paste and grinding the resulting mixture.

'3. The herein described process of producinga water color printing sists in dissolving two parts by weight of gum arabic in two parts by weight of water, mixingthe solution with eighteen parts by weight of glycerine, heating the mixture until it attains a specific gravity of 1280 degrees Baum and is in the form of a paste,

adding igment to the paste and grinding the resu ting mixture.

In testimony hereof I afiix my signature.

JOHN HOEFFLER.

ink, which coni 

